Electric transmitter for use in automatic telegraphy



- June 14, 1927. l 1,632,274

F. G. CREED ELECTRIC TRIISMIIiT'I'ER FOR USE IN AUTOMATIC TELEGRAPHYFiled June 27, 1922 4 sheets-sheet 1 ne 14 1927. J F. G. CREED ELECTRICTRANSMITTER FOR USE IN AUTOMATIC TELEGRAPHY Filed'June 27, 1922 4Sheets-Sheet 2 l, 2,274 'lune 14 1927 F. G. cREl-:D 63

ELECTRIC TRANSMITTER FOR USE 1N AuToMAmc TELEGRAPHY Filed June 27, 19224 sheets-Sheet 3 D E E R C G. E

Jglme 14 1927.

ELECTRIC TRANSMITTER FR USE IN AUTMATIC TELEGRAPHY Filed June 42v, 19224 sheets-sheet 4 llllLlLll 1.@ lrTlxllllLfl -ITITlEmT 4 :.5

Patented .lune 14, 15H7.`

FREDERICK GEORGE CREED, 0F CROYDON, ENGLAND.

ELECTRIC TRANSMITTER 'FOB N AUTOMATIC TELEGRAPI-IY.

Application led .Tune 27, 1922, Serial No. 571,262, and in Great BritainAugust 16, 1921.

rl`his invention has reference to electric transmitters of the type usedwith punched tape in automatic telegraphy for transmitting electricsignals according to the lVheatstone, Morse or other system and it hasfor its object to simplify and facilitate the construction and improvethe working of such transmitters and to avoid any need for adjustment ofparts thereof after they have been made and set up for use.

For this purpose in an electric transmitter according tothe presentinvention, the spring controlled bell crank levers carrying the peckers,carry movable contacts arranged directly to co-act in alternate orderwith stationary contacts for connection with the transmit-ting circuit.Such stationary contacts may advantageously be arranged between andco-axial with the movable contacts. In this way the number of partsnecessary for effecting, breaking and reversing the electricalconnections to the transmitting line is considerably reducedI and thenumberl of parts requiring` adjustment considerably lessened, ascompared with known transmitters of the VVheatstone type.

To maintain the peckers carried by the spring controlled bell cranklevers in their proper upright positions in relation to the perforatedtape, the feed wheel is formed with two parallel annular grooves againstthe inner ends or bottoms of which the pecl:- ers are caused constantlyto bear by springs.

Also, with the object mentioned, the spring controlled bell crank leverscarrying` the peckers and movable contacts, the stationary contacts, therocker beam for operating the levers, the driving spindle, the tape feedwheel, the jockey pulley for use therewith and the gearing between thedriving spindle and feed wheel, used in` electric transmitters of thckind referred to, are mounted on a vertical supporting plate to form aunit adapted to be inserted in a` supportingl frame or standard providedwith a base or footpiece.

The driving` spindle of the transmitter may advantageously be drivenfrom an electric motor through variable speed gear of the friction typecomprising tivo friction discs arranged at right angles to one anotherand one of which is adapted to be traversed in a radial direction acrossthe face of the other.

.Bv this means the speed of the transmitter can' fe easily andaccurately varied 'in a noisettes manner,

lfor at the frei ln the.` accompanying` .illustrative drawings, Fig. 1is a. front elevation, Fig. 2 a central vertical section on the lineH-II of Fig. l and Fig. 3 a rear .elevation of an electric transmitterconstructed according to the invention. Fig. lis a detail view to a rlarger scale. Fig. 5 is a diagram. Figs. 6 and 7 are respectively frontand side eleva tions and Fig. 8 a plan, showing the electric transmittercombined with a motor to form a complete transmitting unit. Fig. 9 is adetail view.

a and o are the spring controlled bell Vcrank levers carrying thepeclters c and Z and movable contacts e and f; g the rocher beam foroscillating such bell crank levers; It the driving spindle, z' a supportfor fixed insulated contacts el and f1 designed to co operate with thesaid movable contacts c and f; m the tape feed` wheel and n the jockeypulley for retaining punched tape in position in relation to' the feedwheel, these parts being mounted at the front side of a single verticalsupporting plate o that is adapted to serve as a bearing plate for the oto the rear side thereofwhiclr is provided with a casing t and cover uenclosing the rearwardly extending ends of the pivot pins and spindlesand also thev gearing connectingthe driving spindle and feedwheel'spindl'e. The front and rear casings r and t, except their covers, mayadvantageously be made integral with the vertical supporting plate o andare preferably cylindrical in shape, this shape making for cheapness 'inVmanufactuie and convenience in mounting.

The combined parts are adapted to bepushed endways into and iiXed inposition for use, within a supporting frame or standard w provided witha base or foot piece w1. The insulated tix-ed contacts el, f1 mayadvantageously be connected' respectively to pins l and 2 extending.from the support there- 'of the vertical plate 0, iig of in that plates'ujeli! through op n manner that they Will be caused to bearrespectively against spring contacts carried by the traine or standardfw, when the vcrtical supporting,` plate 0 with attached parts passedendivays'into position in such traine or standard. The several parts otthe transmitter described can be variously constructed.

Thus, in the example shown, the horizon. tal arm of e ch pivoted bellcrank lever a and has secured thereto7 tor instance by sweating,arliardened steel pin 5 against which a correspon-ding tappet (i on therocker beam g acts intermittently so as to depress suoli pin against theaction ot a coiled spring` 'l' coniiecting the doaf'nn'ardly exteiidinevarni of the lever to a `tired pin tl. Each of the movable Contact pins eiid is shown as permanently Vlived to the depending arm ot thecorrespondinl bell crank lever. rllhe two stationary contacts el and jttor use with the tivo movable contact pinsv e and are. constituted byhorizontal screws carried by the support 'i which yconsists o't acircular block ot insulating material lixed to the front side o'ttheplate 0 and carries the tivo transverse metal pins l and 2. 'ihcse pinsare arranged with their axes in acoininon horizontal plane and extendthrough the plate 0 and bear against two independent contacts only oneof which is shown in the drawing, namely at 9, inv Fig. 2. Each of themis in the torni ota pair ot meta-l spring blades carried by a block 10of insulatingl material lined to the :traine or standard fw. The twopairs ot syning blade contacts 9 extend tlirough the cover u and arethus protected thereby` The pins 1 and 2 have enlarged front endportions fixed in the circular insulating supporti. The two screwsconstituting' the sta tionary horizontal contacts el and fl, may besoreivediinto `the enlarged ends oi the tivo pins 1 and A2, so thatltheycaii be adjusted horizontally in relation to the mov-r ablecontacts e and j", and be lixedin the` said pinsA by elainpscrews 1252t1passing throughV Washers bearing againstthelront of the insulating'block vi and-taking into the two pins land 2 so Ythat ivlien tightenedup the cont-act screws are clamped between the Contact pin 1 or@7andtheiinsulating block AIn the example shown, the stationary c on ytacts f1 and el are designed to be connectedV through. the insulatedcontacts 9 tol the positive and negative poles respectively ot Aa splitelectric battery 11, asslioivn lin Figs. 5, Whilst the movable contactsaand y are designed to be connected through the bell crank levers ci and@springs 7 and pin 8 to one terminal et a. telegraph relay 11a` theother terminalo't which is connected to the middle point of the splitbattery 11` the relay acting` to control Vthe supply ot current from anand negative poles o't' a split battery the middle point ot which isconnected direct to a line Wire7 whilst the inoval'rile contacts e andare connected to earth. lr the iiiovable contacts e and may be insulated'troni the bell crank levers and connected, as through light 'flexiblewires and other coiinections to a line wire, the central portion ot thebattery being connected to earth.

rllhe rocker beam g may, as shown, be tornied ot a metal plate fixed tothe torward end oii a sul'iporting pin 12, and provided with a pair ot'torwardljyf bent extensions or tappels (3 arranged to act alternatelyon the hardened pins 5 carried by the bell crank levers (i and Zi. rlhepin 12 extends through a bearing in the vertical plate 0 and is retainedin position endvrays, as by a splitI `ring.; or collai 13. The saidplate g is provided with an open ended inclined slot g1 (Fig. 9) Fittedwith a sliding transverse block g2 into which extends a rotary eccen-Vtric pin le' formed on the 'front end oit the driving spindle 7i.through a bearing in the vertical supporting; plate 0 and is provided atthe rear side ot such plate, with a toothed pinion 15. It isV heldendivays in position inthe plate con-A veniently by a split ring` oi'`collar 16, enf

circling; its vrear end and located, between the pinion and the plate.rlhe toothed pinion 15 is adapted to be driven iroii'i a suitable motor,'liorinstance an electric motor 17 (Figs. 6, 7 and S). This motor may,as shownl advantageously be mounted on a corresponding bed plate 18 insuch a Way that when the vertical plate 0 with associated parts ispushed into the traine or standard w, the driving spindle It ot thetransmitter Will become automatically connected to a spindle 19 drivenby the motor.,` it may be through a. spring coupling orn shown, througha tlexible joint at 19a. The spindles vvi and 19 may advantageously bedriven trom `the main driving'` sha'tt 2O ot the motor through variablespeed lriction gearing coinprising a friction disc 2,1 tixed on the maindriving' shaft 20 and a iriction dise 22 mounted to turn with and toslide endways upon a secondary shalt 28 coupled to the spindle 19. rlhesha'l't 33 is mounted in a standard 2li on the base plate 1S and thertriction disc 22 is arranged to be moved along.;` the said sha'i'it bythe t'orled extremity ol a bar 25 carried by a nut 26 mounted on aVscrew spindle 27, also carried by the stand ard 24, and capable otbeing turned by hand but not oit movingendvvays so thatl by adjustmentot the yposition of the 'friction dise 22 in relation to the centre otthe friction disc 21, the speed oi the drivingl shalft k oi rlhisspindle extends,

lll-5 the transmitter can he readily varied to suit requirement. Theadjacent ends of the spindles it and 19 may be halved to enable the oneto he readily placed in driving connection with the other. Or the motormay be arranged away from the transmitter, and its drivin-g' spindle beconnected to that of the transmitter through flexible shafting. Also,

regulation of thespeed of 'the transmittermay be effected by regalating`the speed of the motor and dispensing` with variable speed gear.

The tape feed wheel mis located near the top of the front casing rcarried by the vertical supporting plate 0 and is fixed to a spindle 28that extends through that plate and a rear bearing; extension o2 of suchplate and has l.fixed to its rear end a toothed wheel 29 in ,gear withthe pinion 16 on the driving spindle 7L of the transmitter.

To maintain the peckers c and-Z carried by the Vbell crank levers c andZ) in their proper upright positions in relation to the perforated tape,the feed wheel m is formed with two parallel annular grooves at 30 and31 against the inner ends of which the peckers are caused constantly tobear by separate coiled springs 32 connected to them and to the verticalplate 0 at 33. rlfhe vte'rooved jockey pulley n forense with the feedwheel m and peckers c and Z extends through an opening at 3ft in theadjacent casing,` s and is carried by one arm of the linger operatedlever y? fixed on a spindle 36 extending through the vertical plate 0and connected at the back of this plate to a coiled spring` 37, thelever being` adapted to be held in its operative or inoperative positionat` will.

38 is a sheet metal stripper between which and the jockey pulley a, theperforated tape passes and in which are slots through which the peckersC and CZ work.

llVhat l claim is :M

l. ln an automatic telegraphic transmitter of the kind comprising' avertical support, two bell crank levers pivoted to the front sidethereof and each having' a horizontal arm and a depending' arm, the twohorizontal arms extending towards each other, a rotary tape feed wheelmounted at the front of said support, two upwardly extending' peckersconnected respectively to the inner ends of the two horizontal arms ofsaid levers and adapted to co-operate with perforated tape, means fordepressing' the horizontal arms of said levers alternately and spring`means tending' to raise the horizontal arms of said levers and to movethe depending arms ofsaid levers towards each other, the combinationwith the two depending' arms of the levers of two movable electriccontacts carried thereby, two stationary contacts arranged between themovable contacts and carried by said support but insulated therefrom andtwo insulated contact pins connected to said stationary contacts,extending through said support and adapted to make electrical connectionwith other insulated contacts, when the transmitter is mounted inposition for use.

ln-an automatic telcgraphic transmittor of the kind comprising alvertical support, two bell crank levers pivoted to the front sidethereof and each-having,` a horizontal arm and a depending arm, the twohorizontal. arms extending; towards each other, a rotary tape feed wheelmounted at the front of said support, two upwardly extending peekersconnected respectively to the inner ends of the two horizontal -arms ofsaid levers and adapted to co-operate with perforated tape, means fordepressing the horizontal arms of said levers alternately andspring'imeans tendine; to raise the horizontal arms of said levers andto move the depending arms of said levers towards each other thecombination with the depending arms of saidl levers of movable electriccontacts carried thereby, a block of insulating material fixed to saidsupport, two stationary contacts carried by said block and arrangedbetween and opposite the movable contacts and two pins connected to therespective stationary contacts, carried by said block, extending throughsaid support and adapted to make electrical connection with otherinsulated contacts when the transmitter is mounted in position for use.

3. An automatic telegraphic transmitter of the type herein referred to,comprising a vertical support, a pair of spring' controlled bell-cranklevers pivoted thereto and arranged to move in the same vertical plane,a rocker beam for depressing said levers in alternate order against theaction of their spring controlling means, said beam being pivoted tosaid support and having' a slot therein, a rotary driving' spindlecarried by said support, an eccentrically arranged pin carried by oneend of said spindle and a slide block connected to said pin and arrangedto work in the slot in said beam, for the purpose set forth.

t. An automatic telegraph transmitter comprising' a vertical platehaving a horizontal peripheral rim, a tape feed wheel, a rotary spindlefor said feed wheel, a pair of spring' controlled hell crank leverspivoted to said plate and having` depending arms, tape peckers carriedby said levers and adapted to cooperate with perforated tape, means foractuating said levers in alternate order against the action of theirspring controlling means, a driving shaft for actuating said leveractuating' means, nearing` between said driving' shaft and spindle,movable contacts carried by the depending' arms of said levers,stationary insulated contacts arranged between. the movable contacts andcarried by said plate, contact pins connected to the stationary pins,extending through said plate and insulated from each other, a standardhaving an openingr therein wherein said plate with associated parts ismounted and from which it can be readily Withdrawn by lateral movementand a pair of insulated contacts carried by said standard and with whichthe pair of insulated pins will automatically make electrical connectionwhen the plate is inserted laterally into such stand ard.

5. Automatic telegraph transmitting apparatus consisting` of a unitcomprising a vertical support, a tape feed wheel, a rotary spindlecarried by said support and connect ed to said feed wheel, a pair ofspring' controlled bell crank levers, `pivoted to said support, tapepecliers carried by said levers, movable contacts carried b v saidlevers, stationary contacts carried by but insulated from said supportand arranged between the movable contacts, means tor actuating said bellcrank levers in alternate order against the action oit their sprangcontrolling means, a rotary driving shaft for operating` the leveractuating means, and gearing between said shaft and the tape Ywheelspindle, a standard having` an aperture in which said unit is locatedand in which said. unit can be placed by endways movement thereof, asecond drivin v shaft held against endways movement, a stationarysupport for such shaft, a motor and variable speed mechanism betweensuch drivingshailft and motor, the last mentioned drivingl sha-tt andthe driving' shaftt of said unit being; coaxial and having;v theiradjacent ends adapted to come automatically into driving connection withone another when said unit is inserted sideways in said standard.

Signed at New York, county and State of New York, U. S. A., thistwenty-sixth day oit' June, 1922.

FRE ERIC-K GEGRGE @REED

